my apps dont run after update eclipse & adt

问题:

I updated Sdk manager & eclipse & Adt
but now new android app dont run.
my android app automatically create actionbaractivity & import android-support-v7

this is my error log:

Description Resource Path Location Type ActionBarActivity cannot be resolved to a type MainActivity.java /testpro/src/com/example/testpro line 9 Java Problem ActionBarActivity cannot be resolved to a type MainActivity.java /testpro/src/com/example/testpro line 13 Java Problem ActionBarActivity cannot be resolved to a type MainActivity.java /testpro/src/com/example/testpro line 34 Java Problem error: Error retrieving parent for item: No resource found that matches the given name 'Theme.AppCompat.Light.DarkActionBar'. styles.xml /testpro/res/values-v14 line 8 Android AAPT Problem error: Error retrieving parent for item: No resource found that matches the given name 'Theme.AppCompat.Light'. styles.xml /testpro/res/values line 7 Android AAPT Problem error: Error retrieving parent for item: No resource found that matches the given name 'Theme.AppCompat.Light'. styles.xml /testpro/res/values-v11 line 7 Android AAPT Problem R cannot be resolved to a variable MainActivity.java /testpro/src/com/example/testpro line 14 Java Problem R cannot be resolved to a variable MainActivity.java /testpro/src/com/example/testpro line 21 Java Problem R cannot be resolved to a variable MainActivity.java /testpro/src/com/example/testpro line 31 Java Problem The import android.support cannot be resolved MainActivity.java /testpro/src/com/example/testpro line 3 Java Problem The method getMenuInflater() is undefined for the type MainActivity MainActivity.java /testpro/src/com/example/testpro line 21 Java Problem The method onCreate(Bundle) of type MainActivity must override or implement a supertype method MainActivity.java /testpro/src/com/example/testpro line 12 Java Problem The method onCreateOptionsMenu(Menu) of type MainActivity must override or implement a supertype method MainActivity.java /testpro/src/com/example/testpro line 19 Java Problem The method onOptionsItemSelected(MenuItem) of type MainActivity must override or implement a supertype method MainActivity.java /testpro/src/com/example/testpro line 26 Java Problem

回答1:

1. Right-click on the project you are working on from Package Explorer
2. Go to "Properties" 3 Go to "Java Build Path" from the right tree structure
3. Go to the "Libraries" tab
4. Choose the "Add Library" button
5. Select "JRE System Library"
6. Hit "Next"
7. The radio button will prompt the Workspace default JRE, and let it be that way
8. Hit "Finish"